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Ecological Association Between the Red-Cockaded Woodpecker and Southern Pine Beetle in the Homochitto National Forest: a Geographic Information System Approach (open access)

Ecological Association Between the Red-Cockaded Woodpecker and Southern Pine Beetle in the Homochitto National Forest: a Geographic Information System Approach

Since the introduction of management practices by the Forest Service to stabilize red-cockaded woodpecker (RCW) populations, the number of cavity trees killed by southern pine beetles (SPB) has increased. A model of the landscape ecology of RCW and SPB in the Homochitto National Forest was created using data collected from the Forest Service and Global Atmospherics. The conclusions of the study were that the RCW and SPB utilize the same type of habitat and the stand hazard maps are an accurate means of determining the locations of SPB infestations. The functional heterogeneity maps created for the SPB and RCW would be useful predictors of future occurrences of either species if complete data were obtained.
Date: December 1998
Creator: Skordinski, Karen R. (Karen Renee)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
N-Acylphosphatidylethanolamine in Dry and Imbibing Cottonseeds. Amounts, Molecular Species, and Enzymatic Synthesis (open access)

N-Acylphosphatidylethanolamine in Dry and Imbibing Cottonseeds. Amounts, Molecular Species, and Enzymatic Synthesis

Article on N-acylphosphatidylethanolamine in dry and imbibing cottonseeds.
Date: September 1995
Creator: Sandoval, John A.; Huang, Zhi-Heng; Garrett, David; Gage, Douglas A. & Chapman, Kent D.
Object Type: Article
System: The UNT Digital Library
Systematics of the Stonefly Tribe Suwalliini Surdick and Behavioral Studies of Selected Species in the Stonefly Families Chloroperlidae and Perlidae (open access)

Systematics of the Stonefly Tribe Suwalliini Surdick and Behavioral Studies of Selected Species in the Stonefly Families Chloroperlidae and Perlidae

The purpose of this study is to revise the genus Suwallia and to evaluate the potential taxonomic importance of adeagal and other genitalic characters, adult pigment patterns and egg characters. The revision concentrates on western North American species while providing coverage of all species, except Suwallia asiatica Zhiltzova and Lavanidova where only presumed females have been available for study. Communication and mate locating behaviors in adult stoneflies are critical for life cycle completion and species perpetuation. Drumming signals are known for numerous species of Plecoptera, but mate searching patterns and specifically, if or how vibrational communication is utilized for locating mates are virtually unknown for all stonefly species. I conducted field or laboratory studies of three species to elucidate mate searching patterns and how vibrational communication is used for locating mates. The species studied included a bushtopper, Suwallia pallidula (Banks); a ground scrambler, Claassenia sabulosa (Banks); and treetopper, Perlinella drymo (Newman). The "fly-tremulate-search". "rock to rock" and "fly-drum-search" search patterns exhibited by these species are described, as well as how vibrational communication is used for mate finding. Vibrational signal production by tremulation is reported for the first time in Suwallia, and for only the second time Plecoptera.
Date: August 1997
Creator: Alexander, Kevin D. (Kevin Dewayne)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Development of a Watershed Prioritization Strategy Using Remote Sensing and the Geographic Resource Analysis Support System. Case study: City of Carrollton, Texas (open access)

Development of a Watershed Prioritization Strategy Using Remote Sensing and the Geographic Resource Analysis Support System. Case study: City of Carrollton, Texas

This study used a geographic information system (GIS) and an empirical pollutant load model to estimate average annual pollutant loads contained in storm water charges from the City of Carrollton, Texas. The Geographic Resource Analyses Support System (GRASS) was used to create a number of spatial data layers as input variables to a model that estimates loads in Kilograms/Hectare/Year, and Kilogram/Basin/Year. Average annual pollutant loads for twelve pollutants were derived from average annual rainfall/runoff volumes, coupled with Local Dallas/Fort Worth Metroplex storm water Event Mean Concentrations.
Date: December 1996
Creator: Coffey, Jeffery M. (Jeffery Morgan)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Advanced Molecular and Microbial Techniques: a Complete Laboratory Notebook (open access)

Advanced Molecular and Microbial Techniques: a Complete Laboratory Notebook

The purpose of this project is to produce a complete and thorough notebook that may be used to supplement laboratory coursework. Its intent is to be used primarily by the students to aid them in understanding background information and the proper laboratory procedures involved in various types of experiments. The laboratory notebook is a summation of all the experiments and procedures used in the six-credit hour Advanced Microbial and Molecular Biology (BIOL 5160) course offered during the summer semester at the University of North Texas. This class is a team taught effort by Professors O'Donovan and Kunz. The course is constructed as an intensive practice exercise to teach the student about gene mutations, biosynthetic pathways, preparation and analysis of plasmid DNA, and many other topics included in the notebook.
Date: May 1998
Creator: Brito-Rodriquez, Carmen Lydia
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Pretreatment Optimization of Fiberglass Manufacturing Industrial Wastewater (open access)

Pretreatment Optimization of Fiberglass Manufacturing Industrial Wastewater

Wastewater effluent produced in the fiberglass manufacturing industry contains a significant amount of total suspended solids. Environmental regulations require pretreatment of effluent before it is discharged to the municipal wastewater treatment plant. Chemical precipitation by coagulation and flocculation is the method of pretreatment used at the Vetrotex CertainTeed Corporation (VCT). A treatability study was conducted to determine conditions at which the VCT Wastewater Pretreatment Plant could operate to consistently achieve a total suspended solids concentration ≤ 200-mg/L. Jar tests varied pH, polymer dosage, and ferric sulfate dosage. Total suspended solids and turbidity were measured to evaluate treatment performance. The data were used to determine an optimum set of conditions under project guidelines. Of twelve polymers screened, BPL 594 was selected as the most effective polymer. For cost efficiency in the wastewater pretreatment operation, recommendations suggested that treatment chemical injection be electronically controlled according to turbidity of the treated effluent.
Date: December 1998
Creator: Dragoo, Ron
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Engineering Disease Resistance in Plants: An Overview (open access)

Engineering Disease Resistance in Plants: An Overview

This book chapter gives an overview of engineering disease resistance in plants.
Date: 1995
Creator: Dixon, R. A.; Paiva, Nancy L. & Bhattacharyya, Madan Kumar
Object Type: Book Chapter
System: The UNT Digital Library
Activation of an S6/H4 Kinase (PAK 65) from Human Placenta by Intramolecular and Intermolecular Autophosphorylation (open access)

Activation of an S6/H4 Kinase (PAK 65) from Human Placenta by Intramolecular and Intermolecular Autophosphorylation

Article proposing a model in which phosphorylation of sites 1 and 2 occurs sequentially. The model proposes that trypsin treatment of the inactive holoenzyme removes an inhibitory rac-binding domain which blocks MgATP access to the catalytic site. The pseudosubstrate domain at site 1 is autophosphorylated and subsequent bimolecular autophosphorylation at site 2 fully opens the catalytic site.
Date: September 8, 1995
Creator: Benner, Gretchen E.; Dennis, Patrick B. & Masaracchia, Ruthann A.
Object Type: Article
System: The UNT Digital Library
Molecular cloning and characterization of a gene encoding pea cytosolic ascorbate peroxidase (open access)

Molecular cloning and characterization of a gene encoding pea cytosolic ascorbate peroxidase

Article isolating a gene encoding cytosolic bate peroxidase (ApxI) from pea (Pisum sativum L.) and determining its nucleotide sequence.
Date: October 25, 1992
Creator: Mittler, Ron & Zilinskas, B.A.
Object Type: Article
System: The UNT Digital Library
Activation of an S6 Kinase From Human Placenta by Autophosphorylation (open access)

Activation of an S6 Kinase From Human Placenta by Autophosphorylation

Article describing a novel S6 kinase isolated from human placenta which autoactivates through autophosphorylation in vitro. The data supports the hypothesis that this previously uncharacterized S6 kinase belongs to a unique family of protein kinases which utilize autophosphorylation as part of their in vivo activation mechanism.
Date: September 15, 1993
Creator: Dennis, Patrick B. & Masaracchia, Ruthann A.
Object Type: Article
System: The UNT Digital Library
Nucleotide Sequence of xylE from the TOL pDK1 Plasmid and Structural Comparison with Isofunctional Catechol-2,3-Dioxygenase Genes from TOL pWW0 and NAH7 (open access)

Nucleotide Sequence of xylE from the TOL pDK1 Plasmid and Structural Comparison with Isofunctional Catechol-2,3-Dioxygenase Genes from TOL pWW0 and NAH7

Article on the nucleotide sequence of xylE from the TOL pDK1 plasmid and structural comparison with isofunctional catechol-2,3-dioxygenase genes from TOL pWW0 and NAH7.
Date: April 1991
Creator: Benjamin, Robert C.; Voss, John A. & Jiang, Shikun
Object Type: Article
System: The UNT Digital Library
Function of the oxidative burst in hypersensitive disease resistance (open access)

Function of the oxidative burst in hypersensitive disease resistance

Article on the function of the oxidative burst in hypersensitive disease resistance.
Date: May 1, 1995
Creator: Tenhaken, Raimund; Levine, Alex; Brisson, Louise F.; Dixon, R. A. & Lamb, Christopher J.
Object Type: Article
System: The UNT Digital Library
Identification of cDNA clones encoding valosin-containing protein and other plant plasma membrane-associated proteins by a general immunoscreening strategy (open access)

Identification of cDNA clones encoding valosin-containing protein and other plant plasma membrane-associated proteins by a general immunoscreening strategy

Article on the identification of cDNA clones encoding valosin-containing protein and other plant plasma membrane-associated proteins by a general immunoscreening strategy.
Date: May 1, 1995
Creator: Shi, Jinrui; Dixon, R. A.; Gonzales, Robert A.; Kjellbom, Per & Bhattacharyya, Madan Kumar
Object Type: Article
System: The UNT Digital Library
Stress responses in alfalfa (Medicago sativa L.) XIX. Transcriptional activation of oxidative pentose phosphate pathway genes at the onset of the isoflavonoid phytoalexin response (open access)

Stress responses in alfalfa (Medicago sativa L.) XIX. Transcriptional activation of oxidative pentose phosphate pathway genes at the onset of the isoflavonoid phytoalexin response

Article on stress responses in alfalfa (Medicago sativa L.) XIX and transcriptional activation of oxidative pentose phosphate pathway genes at the onset of the isoflavonoid phytoalexin response.
Date: August 1, 1995
Creator: Fahrendorf, Theodor; Ni, Weiting; Shorrosh, Basil S. & Dixon, R. A.
Object Type: Article
System: The UNT Digital Library
Accumulation of  α-Keto Acids as Essential Components in Cyanide Assimilation by Pseudomonas fluorescens NCIMB 11764 (open access)

Accumulation of α-Keto Acids as Essential Components in Cyanide Assimilation by Pseudomonas fluorescens NCIMB 11764

Article on the accumulation of α-Keto acids as essential components in cyanide assimilation by Pseudomonas fluorescens NCIMB 11764.
Date: November 1, 1998
Creator: Kunz, Daniel A.; Chen, Jui-Lin & Pan, Guangliang
Object Type: Article
System: The UNT Digital Library
Utilization of Cyanide as a Nitrogenous Substrate by Pseudomonas fluorescens NCIMB 11764: Evidence for Multiple Pathways of Metabolic Conversion (open access)

Utilization of Cyanide as a Nitrogenous Substrate by Pseudomonas fluorescens NCIMB 11764: Evidence for Multiple Pathways of Metabolic Conversion

Article on the utilization of cyanide as a nitrogenous substrate by Pseudomonas fluorescens NCIMB 11764 and evidence for multiple pathways of metabolic conversion.
Date: June 1, 1992
Creator: Kunz, Daniel A.; Nagappan, Olagappan; Silva-Avalos, Juan & Delong, George T.
Object Type: Article
System: The UNT Digital Library
Degradation of the Metal-Cyano Complex Tetracyanonickelate(II) by Cyanide-Utilizing Bacterial Isolates (open access)

Degradation of the Metal-Cyano Complex Tetracyanonickelate(II) by Cyanide-Utilizing Bacterial Isolates

Article on the degradation of the metal-cyano complex tetracyanonickelate(II) by cyanide-utilizing bacterial isolates.
Date: December 1, 1990
Creator: Silva-Avalos, Juan; Richmond, Michael G.; Nagappan, Olagappan & Kunz, Daniel A.
Object Type: Article
System: The UNT Digital Library
Enzymes of B-Ring-Deoxy Flavonoid Biosynthesis in Elicited Cell Cultures of "Old Man" Cactus (Cephalocereus senilis) (open access)

Enzymes of B-Ring-Deoxy Flavonoid Biosynthesis in Elicited Cell Cultures of "Old Man" Cactus (Cephalocereus senilis)

Article on enzymes of b-ring-deoxy flavonoid biosynthesis in elicited cell cultures of "Old Man" cactus (Cephalocereus senilis).
Date: August 20, 1995
Creator: Liu, Qin; Bonness, Maureen S.; Liu, Ming; Seradge, Espanta; Dixon, R. A. & Mabry, Tom J.
Object Type: Article
System: The UNT Digital Library
Design of highly specific cytotoxins by using trans-splicing ribozymes (open access)

Design of highly specific cytotoxins by using trans-splicing ribozymes

This article discusses the design of highly specific cytotoxins by using trans-splicing ribozymes.
Date: March 30, 1999
Creator: Ayre, Brian G.; Köhler, Uwe; Haseloff, Jim & Goodman, Howard M.
Object Type: Article
System: The UNT Digital Library
Increased disease susceptibility of transgenic tobacco plants with suppressed levels of preformed phenylpropanoid products (open access)

Increased disease susceptibility of transgenic tobacco plants with suppressed levels of preformed phenylpropanoid products

Article on increased disease susceptibility of transgenic tobacco plants with suppressed levels of preformed phenylpropanoid products.
Date: August 2, 1994
Creator: Maher, Eileen A.; Bate, Nicholas J.; Ni, Weiting; Elkind, Yonatan; Dixon, R. A. & Lamb, Christopher J.
Object Type: Article
System: The UNT Digital Library
Cis elements and potential trans-acting factors for the developmental regulation of the Phaseolus vulgaris CHS15 promoter (open access)

Cis elements and potential trans-acting factors for the developmental regulation of the Phaseolus vulgaris CHS15 promoter

Article on cis elements and potential trans-acting factors for the developmental regulation of the Phaseolus vulgaris CHS15 promoter.
Date: September 1, 1995
Creator: Hotter, Grant S.; Kooter, Jan; Dubery, Ian A.; Lamb, Christopher J.; Dixon, R. A. & Harrison, Maria J.
Object Type: Article
System: The UNT Digital Library
CUE1: A Mesophyll Cell-Specific Positive Regulator of Light-Controlled Gene Expression in Arabidopsis (open access)

CUE1: A Mesophyll Cell-Specific Positive Regulator of Light-Controlled Gene Expression in Arabidopsis

Article on CUE1 and a mesophyll cell-specific positive regulator of light-controlled gene expression in Arabidopsis.
Date: October 1, 1995
Creator: Li, Hsou-min; Culligan, Kevin M.; Dixon, R. A. & Chory, Joanne
Object Type: Article
System: The UNT Digital Library
Stress Activation of a Bean Hydroxyproline-Rich Glycoprotein Promoter is Superimposed on a Pattern of Tissue-Specific Developmental Expression (open access)

Stress Activation of a Bean Hydroxyproline-Rich Glycoprotein Promoter is Superimposed on a Pattern of Tissue-Specific Developmental Expression

Article discussing stress activation of a bean hydroxyproline-rich glycoprotein promoter superimposed on a pattern of tissue-specific developmental expression.
Date: September 1, 1995
Creator: Wycoff, Keith L.; Powell, Patricia A.; Gonzales, Robert A.; Corbin, David R.; Lamb, Christopher J. & Dixon, R. A.
Object Type: Article
System: The UNT Digital Library
Initiation and maintenance of callus and cell suspension cultures (open access)

Initiation and maintenance of callus and cell suspension cultures

Book chapter discussing the initiation and maintenance of callus and cell suspension cultures.
Date: 1995
Creator: Franklin, C. I. & Dixon, R. A.
Object Type: Book Chapter
System: The UNT Digital Library